I can only speak about pet stores in NZ, they are not all from breeders here, they take them to the pet shop, and i don't know if they are even given any money for them, most of them are from people who just have not bothered to spay their animals, we do of course have some pedigree's as well, and they are specifically bred to sell too, but a majority are just as i have mentioned, so that won't stop people letting their cats and dogs breed i am afraid.